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City of license Dallas, Texas
Broadcast area Dallas/Fort Worth Metroplex
Branding 100.3 Jack FM
Slogan "Playing What We Want"
Frequency 100.3 (MHz) (also on HD Radio)
100.3 HD-2 for "The Strip" (Las Vegas related music)
First air date 1965 as KBOX
Format Jack FM
ERP 97,000 watts
HAAT 574.2 meters
Class C
Facility ID 63779
Callsign meaning K JacK K
Former callsigns KBOX (1965-1973)
KTLC (1973-1976)
KMEZ (1976-1988)
KJMZ (1988-1995)
KRBV (1995-2004)
Affiliations Westwood One
Owner CBS Radio
(CBS Radio Texas, Inc.)
Sister stations KLUV, KMVK, KRLD, KRLD-FM, KVIL
also part of CBS Corp. cluster: TV stations KTVT and KTXA
Webcast Listen Live

KJKK (100.3 FM, "Jack FM") is a radio station in the Dallas-Fort Worth area of Texas. It broadcasts an Adult Hits music format. KJKK is owned by CBS Radio.


This station started as KBOX ("K-box"), playing easy listening and occasional jazz music in the 1960s. Although it was the sister station of KBOX-AM 1480 (now KNIT), a Top 40 and then country music giant during the 1960s and 1970s, the two stations never simulcast (until 1982, when AM 1480 became KMEZ-AM). then in 1973, the call letters were changed to KTLC (meaning Tender Loving Care for your ears) while maintaining its easy listening format. 3 years later, the callsign was changed once again to KMEZ EZ 100 still maintaining the easy format and was a flagship station for SMU College football.

In 1988, the station changed formats to Top 40, Urban, and R&B music and changed its call letters to KJMZ 100.3 Jamz. During its tenure as KJMZ, on-air personality Russ Parr got his start in the radio career here before going to Washington, DC to jumpstart his syndicated morning show, which at one time aired on KBFB. Prior to the change, the KMEZ callsign and format has moved to frequency 107.5 FM. In 1995, Granum Communications (later bought out by Infinity/CBS Radio) bought the station and tweaked the format to Classic and Modern R&B (Urban AC) and renamed the station to KRBV V100; but in 1998, it added Urban hip hop back in the mix and was revamped as Adult Mix V100.3. It was one of the Top Ten stations in the market until a lightning storm knocked out the transmitter. KRBV never returned to its glory days and the ratings sunk, most of it due to philosophical differences in direction of programming for KRBV.

After that, the station began stunting by looping songs from artists such as Rob Base and Eminem for three days straight before changing formats to Rhythmic contemporary/Top 40 and renamed the station Hot 100, calling itself DFW's Party Station. In 2001, the station changed its name again to Wild 100 while maintaining its Top 40 format, and became a home for Austin-based "J. B. and Sandy" morning show. On March 9, 2002, Wild 100 exhumed an old KLIF stunt by declaring themselves a "thing of the past;" the station went dark for about three hours and came back with the same format and name. That same year, J. B. and Sandy's show was terminated.

On the morning of April 1, 2004, Wild 100's morning show was replaced by The Russ Martin Show. This edition of the show was taped earlier in that week; this stunt was a warning sign of the station future format change that came later that year. Later that April Fool's day, Russ Martin was back on the station that "he left for Wild 100," Live 105.3, where he got calls from Russ Martin show listeners who thought this change was for good.

Later that year, the station changed its callsign to KJKK 100.3 Jack FM. That is what is remains today, playing pop currents and oldies. The station went jockless since Jack FM first signed on, and rejects all song requests.

The KRBV call sign eventually went to a Los Angeles-area station, also at 100.3FM but under different ownership. But the letters went away again in 2008 to be replaced by KSWD.

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